Electricity storage device member, method of manufacturing the same, and electricity storage device

Abstract

An electricity storage device member is provided. The electricity storage device member includes a base material mainly composed of a metal and a resin layer stacked on the base material, in which the resin layer contains a crosslinked fluororesin.

The invention claimed is: 
     
       1. An electricity storage device member, comprising:
 a base material mainly composed of a metal; 
 a resin layer stacked on the base material, the resin layer containing a crosslinked fluororesin; and 
 a covering layer containing a fluororesin, 
 wherein the covering layer is stacked on the resin layer opposite the base material, and 
 wherein the fluororesin contained in the covering layer is either a non-crosslinked fluororesin or a fluororesin having a melting point lower than a melting point of the crosslinked fluororesin. 
 
     
     
       2. The electricity storage device member according to  claim 1 , wherein a chemical bond is present between the fluororesin contained in the resin layer and a surface of the base material. 
     
     
       3. The electricity storage device member according to  claim 1 , wherein the resin layer is a thermal bonding layer. 
     
     
       4. An electricity storage device member, comprising:
 a base material mainly composed of a metal; and 
 a resin layer stacked on the base material, the resin layer containing a crosslinked fluororesin, 
 wherein the resin layer contains a cloth or a filler, and 
 wherein the resin layer has a linear thermal expansion coefficient ranging from 1×10 −7 /K to 40×10 −6 /K. 
 
     
     
       5. The electricity storage device member according to  claim 1 , wherein the crosslinked fluororesin is tetrafluoroethylene-hexafluoropropylene copolymer. 
     
     
       6. The electricity storage device member according to  claim 1 , wherein the fluororesin contained in the covering layer is tetrafluoroethylene-hexafluoropropylene copolymer. 
     
     
       7. The electricity storage device member according to  claim 1 , wherein a peel strength between the resin layer and the base material ranges from 0.1 N/cm to 100 N/cm. 
     
     
       8. The electricity storage device member according to  claim 1 , wherein a ten-point average roughness (R Z ) of the surface of the base material in a region on which the resin layer is stacked ranges from 0.001 μm to 10 μm. 
     
     
       9. The electricity storage device member according to  claim 1 ,
 wherein the electricity storage device member is a tab lead or a housing. 
 
     
     
       10. The electricity storage device member according to  claim 4 , wherein the electricity storage device member is a tab lead or a housing. 
     
     
       11. An electricity storage device comprising:
 a positive electrode; 
 a negative electrode; 
 an electrolyte solution; 
 a housing accommodating the positive electrode, the negative electrode, and the electrolyte solution; and 
 a tab lead, 
 the tab lead having one end exposed from the housing and the other end connected to the positive electrode or the negative electrode, 
 the housing and the tab lead being thermally bonded to each other, and 
 at least one of the housing and the tab lead comprising a base material mainly composed of a metal, and a resin layer stacked on the base material, the resin layer containing a crosslinked fluororesin. 
 
     
     
       12. The electricity storage device according to  claim 11 , further comprising a thermal bonding film interposed between the housing and the tab lead,
 wherein the thermal bonding film contains a non-crosslinked fluororesin or a fluororesin having a melting point lower than a melting point of the crosslinked fluororesin.